On micromechanical damage modeling in geomechanics: Influence of numerical integration scheme

Tunnel excavations in deep rocks provide stress perturbations which initiate diffuse and/or localized damage propagation in the material. This damage phenomenon can lead to significant irreversible deformations and changes in rock properties. In this paper, we propose to model such behavior by consi...

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Vydáno v:Journal of computational and applied mathematics Ročník 246; s. 215 - 224
Hlavní autoři: Levasseur, S., Collin, F., Charlier, R., Kondo, D.
Médium: Journal Article
Jazyk:angličtina
Vydáno: Elsevier B.V 01.07.2013
Elsevier
Témata:
Anisotropic damage
Damage
Drilling
Engineering Sciences
Excavation
Initial stresses
Mathematical models
Mechanics
Microcracked geomaterials
Micromechanics
Numerical integration
Perturbation methods
Rocks
Tunnel excavation
Tunnels (transportation)
Micromechanics
Microcracked geomaterials
Initial stresses
Numerical integration
Tunnel excavation
Anisotropic damage
ISSN:0377-0427, 1879-1778
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Shrnutí:Tunnel excavations in deep rocks provide stress perturbations which initiate diffuse and/or localized damage propagation in the material. This damage phenomenon can lead to significant irreversible deformations and changes in rock properties. In this paper, we propose to model such behavior by considering a micromechanically-based damage approach. The resulting micromechanical model, which also accounts for initial stress, is described and assessed through the numerical analysis of a synthetic tunnel drilling in Opalinus Clay. A particular emphasis is put on the numerical integration of the model. In particular, an appropriate choice of the latter is required to ensure the numerical stability and a confident prediction of excavation damaged zone around tunnels.
Bibliografie:ObjectType-Article-2
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content type line 23
ISSN:0377-0427
1879-1778
DOI:10.1016/j.cam.2012.05.022